Havent been posting here lately, but im currently working on a weather system in udk. Udk ships with a day night cycle map which ive been referencing. But it needs more so thats where the weather comes into play. The world will have a day night cycle and randomly have different weather. Currently its just a normal basic weather day, and a rainy day. I plan to have a thunderstorm, windy/gusty day. Maybe ill be able to get a snow day as well but that might take some more work with the landscape.
Its not too much yet but its a good start so heres some screenshots of matinee and kismet. Still working on custom artwork so everything is epics models, which are extremely high poly and polished since they were used for a demo.